On your BuddyBoss account Profile Dropdown, click on Settings. 

On the General tab, enter your current password and update the Account Email field then click Save Changes.

Note: It will send a confirmation email to your old email address to proceed with the changes. Don't forget to check your Spam folder. 

If you no longer have access to your old email address, please send a support ticket so we can assist you. Be ready with your account details as our team will need to verify some information.